JP3688253B2 - Embedding method of tubular member with earth retaining plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for embedding a tubular member with a retaining plate such as an element used for construction of an underground structure constructed so as to cross a railroad track or a road.
[0002]
[Prior art]
Conventionally, as a method of constructing an underground structure in a non-open-cut method so as to cross below railway tracks or roads, it is inserted by pushing tubular members such as elements or pushing them into the ground while excavating and removing earth and sand by towing. In addition, a method of burying them in combination and using them as protection of the underground structure to be constructed or as a main body of the underground structure is used.
[0003]
[Problems to be solved by the invention]
However, in the conventional element embedding method described above, at the stage of inserting the element, ground excavation is performed from the opening at the tip of the element, the excavated earth and sand is taken into the element, conveyed backward, and discharged to the outside. Therefore, when an obstacle is encountered when the element is inserted, the obstacle can be taken in and removed only from the opening at the tip of the element.
In this case, face the face inside the element, and then remove the obstacles on the face, remove the earth around the obstacle, support walls such as retaining walls, pillars, and upsets, etc. It was necessary to install and perform earth retaining work, which was troublesome. It should be noted that, in the case of a configuration in which the excavation by an excavator in the element tip, after the work of removing the excavation of internal leaving the outer shell of the excavator, had the earth retaining Engineering Tsu line.
[0004]
An object of the present invention is to easily remove a ground part in front of an obstacle when an obstacle is encountered when the element is inserted into the ground while excavating the ground at the tip. An object of the present invention is to provide a method for embedding a tubular member with a retaining plate .
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is, for example, as shown in FIGS.
A tubular member that forms a tubular structure and that is inserted and buried in the ground while excavating the ground at the tip opening portion of the blade edge provided at the tip portion with the axial direction as the insertion direction; ,
The earth retaining member that is provided so as to be able to protrude and retract forward from the distal end portion of the tubular member along at least a part of the peripheral wall portion of the tubular member and protrudes forward to excavate a natural ground portion ahead of the distal end portion. In the embedding method of the tubular member with the retaining plate provided with the earth retaining plate,
When the tubular member with the retaining plate is inserted and buried in the ground while excavating the ground at the tip opening portion of the blade provided at the tip thereof, a ground mountain ahead of the tip of the tubular member If there is an obstacle in the part,
The earth retaining step of projecting the earth retaining plate forward from the distal end portion of the tubular member and performing earth retaining of the ground portion in front of the distal end portion;
After the earth retaining step, manually excavating the front natural ground portion retained by the retaining plate, and discharging the earth and obstacles excavated manually through the tubular member to the outside It is characterized by performing.
[0006]
According to the first aspect of the present invention, it is provided so as to be able to protrude and retract forward from the tip portion along at least a part of the peripheral wall portion, and protrudes forward to excavate a natural ground portion ahead of the tip portion. The tubular member provided with the earth retaining plate for retaining the earth is buried in the ground while excavating the ground at the tip opening part of the blade provided at the tip, so when inserted and buried in the ground Moreover, the earth retaining part ahead of the tip part can be earthed by projecting the earth retaining plate forward. Therefore, when an obstacle that prevents the insertion of the tubular member that cannot be crushed is encountered and removed, a retaining plate such as a retaining wall or an upset is supported by projecting the retaining plate forward from the tip. It is possible to easily remove the obstacle by performing earth retaining of the ground part including the obstacle without performing the earth retaining work such as assembling and manually excavating the ground part including the obstacle.
[0007]
Here, as said tubular member, the long thing used as an underground structure by being inserted in the ground is mention | raise | lifted, for example, steel elements, a pipe roof, etc. are mentioned. Further, the tubular member may have any cross-sectional shape as long as it has a tubular shape, and may have a cross-sectional shape such as a rectangular shape, a square shape, a circular shape, an elliptical shape, or the like. Further, the earth retaining plate can be projected and retracted forward from the distal end portion of the tubular member along at least a part of the peripheral wall portion of the tubular member, and the ground plate portion G ahead of the distal end portion can be projected by protruding forward. It may be attached to the tubular member in any way as long as it becomes a retaining ring when excavating. For example, it may be attached to the outer surface of the tubular member so as to be able to protrude and retract in the axial direction from the distal end portion of the tubular member. Alternatively, it may be attached to the inner surface of the tubular member so as to be able to protrude and retract in the axial direction from the distal end portion of the tubular member.
[0008]
Moreover, the shape is arbitrary, for example, in the case of a tubular member having a rectangular cross-section, it may be provided so as to be able to appear forward and backward along any wall portion of the four peripheral wall portions. Specifically, when it is provided in a tubular member having a rectangular cross section, it is provided so as to be able to move forward and backward along at least one surface of the peripheral wall. For example, if it is provided so as to be able to move forward and backward along the top wall part forming the top surface, when the tubular member is inserted into the ground, the earth retaining of the upper part of the natural ground ahead of the tip part is surely secured. It will be something that can be done.
[0010]
And, since the tubular member with the retaining plate is inserted and buried in the ground while excavating the ground at the tip opening portion of the blade edge equipped at the distal end portion, When inserting into the earth, the earth retaining plate ahead of the tip part can be earthed by projecting the earth retaining plate forward. Therefore, when an obstacle that prevents the insertion of the tubular member that cannot be crushed is encountered and removed, a retaining plate such as a retaining wall or an upset is supported by projecting the retaining plate forward from the tip. Without earth retaining work such as assembling, earth retaining of the ground part containing the obstacle can be done, the ground part containing the obstacle can be excavated by hand, and the obstacle can be easily removed. The burial operation of the tubular member with the retaining plate can be speeded up, and the construction period can be shortened .
[0019]
Here, the said obstacle exists in the front natural ground part, and prevents the insertion of the said tubular member, for example, cannot be crushed with a blade edge .
[0020]
When the tubular member with a retaining plate is inserted into the ground while being excavated and buried, there is an obstacle that prevents the tubular member that cannot be crushed in the front ground portion, such as the front ground portion. When it is necessary to excavate and remove, the earth retaining part is earthed in front of the tip part by the earth retaining process, and then the front earth part is excavated and excavated by the discharging process. Thus, by discharging the dug earth and sand and the obstacle to the outside through the tubular member, the front ground part can be easily removed.
That is, when embedding the tubular member with the earth retaining plate, if it is necessary to stop the progress of the tubular member with the earth retaining plate and remove the front natural ground portion, assemble a supporting wall such as a earth retaining wall or an upset. It is possible to easily excavate the natural ground without performing an equal earth retaining work and to remove the front natural ground portion.
[0021]
As a result, there are obstacles that cannot be crushed by excavation at the tip opening portion of the blade edge mounted on the tip portion in the ground portion in front of the tip portion of the tubular member with the retaining plate inserted into the ground. Even in the case, the earthen part is easily earthed without using the earth retaining plate without assembling the earth retaining wall and the supporting work, and the earth part is manually excavated to remove the obstacle along with the earth and sand. Can be removed. That is, even when the obstacle is present, it can be easily removed and the insertion work of the tubular member with the retaining plate into the ground can be resumed, and the burying operation of the tubular member with the retaining plate can be speeded up. The construction period can be shortened.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the configuration will be described.
The element 1 of the element 10 with the earth retaining plate shown in FIG. 1 is used when constructing an underground structure that crosses the railroad track 2 under the railroad track or the road (here, under the railroad track 2). By being inserted and arranged side by side, it is used as a protective part in the construction of the underground structure 3 and becomes the underground structure main body.
The element 1 shown in FIG. 1 shows one of a plurality of elements that are inserted and combined in the ground so that an underground structure that crosses under the railroad track 2 has a long cross-sectional shape. Then, after these elements are assembled in a square shape, the inside is excavated, and the plurality of elements themselves form a square-shaped tubular underground structure. In addition, the inside of the element buried by being inserted into the ground is filled with a hardener such as concrete.
[0028]
The element 1 is made of a long tubular member made of, for example, concrete or steel, and here has a box shape with a rectangular cross section. The element 1 will be described as a general element that is buried after a reference element that is inserted into the ground while excavating as a first element when constructing an underground structure. In addition, in FIG. 1, the element embed | buried previously is shown with the code | symbol 1E.
Element 1 is embedded in the ground by the propulsion method. As described above, the axial direction is the insertion direction, the tip (one end) is equipped with a blade, and the ground is excavated at the tip opening. While being propelled, it is inserted into the ground and buried.
[0029]
The element 1 shown in Figure 1, the distal end portion of the axial direction 12 that is, before end 12 serving as a front end side when it is inserted into the ground, cutting edge 6 of the outer diameter substantially the same diameter of the element 1 is If an obstacle (indicated by reference numeral 8 in FIG. 3) is present on the outer peripheral portion of the tip end portion 12 when the element 1 itself is excavated / inserted, A retaining plate 5 for retaining the soil is attached to secure a removal work space around the obstacle for removing the object.
[0030]
The earth retaining plate 5 is plate-shaped, and is perpendicular to the top surface plate portion 51 and a top surface plate portion 51 that is slidable along the top surface (the upper surface of the outer surface) 1 a of the element 1. And a side plate portion 52 slidably provided along the side surface 1b. These plate portions 51 and 52 are formed in an L-shaped cross section, and are provided on guide members 55 and 56 attached along the corners of the element 1 at side portions 51a and 52a that are separated from each other along the respective longitudinal directions. It is supported so that it can slide along, that is, can move forward and backward from the front end portion 12 of the element 1. The guide members 55 and 56 are each formed of a U-shaped long member, and the side portions 51 a and 52 a are internally fitted by fixing the opposing side wall portions to the element 1.
The length of the earth retaining plate 5 in the axial direction protrudes forward from the front surface of the blade edge 6 attached to the distal end portion 12 when slid, and has a length capable of forming a work space. In addition, the earth retaining plate 5 may be made of any material as long as the earth retaining plate 5 has a durability capable of performing earth retaining by being protruded and capable of forming a ground mountain in front of the blade edge 6 as a work space. For example, the thing made from wood, resin, steel is mentioned.
[0031]
In addition, although the shape of the earth retaining plate 5 attached to the element 1 is a long one having an L-shaped cross section, the top surface 1a is not limited to this, for example, as shown in FIG. And it is good also as a structure which provided the two plates 51A and 52A so that sliding was possible on the one side 1b slidably forward. In this case, the guide members 57 and 58 for slidably fitting the side edges 51b and 52b of the respective plates 51A and 52A parallel to the axial direction of the elements are provided on the outer surfaces 1a and 1b of the elements, respectively. Etc. The guide members 57 and 58 are attached to the outer surfaces 1a and 1b of the element 1, respectively, so that concave portions facing each other are formed. Both side edges 51b and 52b are slidably fitted in these recesses.
[0032]
In addition, the earth retaining plate 5 is configured to slide on the element 1 along the top surface 1a and the one side surface 1b. Any method may be used. For example, the outer peripheral surface may be provided along four surfaces, or may be provided along three surfaces. The earth retaining plate 5 is not moved backward from a predetermined position by a stopper (not shown) provided in the element 1. Here, the predetermined position is preferably a position where the front end of the retaining plate 5 is rearward of the front surface of the blade edge 6 and can be easily projected, that is, a position where it is disposed in the vicinity of the rear edge of the blade edge 6.
[0035]
Next, a method for embedding the element 1 described above will be described.
First, in order to construct the underground structure 3 by inserting a plurality of elements including the element 1 into the ground 4 below the railway track 2 and burying and connecting them, the both sides of the railway track 2 are formed on the ground 4. , A start side shaft (not shown) for starting the embedded element, and a reaching side shaft 7 (see FIG. 5) that reaches the blade edge 6 facing the start side shaft and attached to the tip of the embedded element Build 1) .
[0036]
Then, in order to insert the first reference element 1E into the ground, a hole drilled by horizontal boring in the horizontal direction to extend in the horizontal direction and cross in the ground 4 under the railroad track 2 is formed. A PC steel strand 18 is inserted into the hole, and the element 1E inserted into the PC steel strand 18 and the blade 6 provided at the tip of the element are connected. Then, a traction device 19 such as a hydraulic jack that pulls the wire 18 from the PC steel by taking a reaction force from the retaining wall 71 of the arrival side shaft 7 is installed on the arrival side shaft 7 side. While pulling the element and the blade edge 6 with this traction device 19, the element is inserted and buried in the ground toward the arrival side shaft 7 while excavating the tip of the element with the blade edge 6.
[0037]
In addition, although not shown in figure, the earth retaining plate which can be projected and retracted in front of the blade edge | tip 6 attached to the element front-end | tip part is attached to the outer peripheral surface of the front-end | tip part of this reference | standard element 1E. Although this earth retaining plate may be attached to any of the four outer peripheral surfaces, it is desirable that the retaining plate be provided so as to protrude forward along at least the top surface and both side surfaces. If it is provided so as to be able to move in and out in the axial direction along the four surfaces, a workable space is provided in front of the blade edge 6 even if the soil properties on the four sides of the ground part to be excavated and inserted are weak. Can be built.
[0038]
Then, similarly to the preceding embedded element (reference element in this figure) 1E, adjacent to the preceding element 1E, the element 1 is inserted into the ground while excavating the ground with the cutting edge 6 at the tip. Then, the blade edge 6 reaches the arrival side shaft 7 and is buried in the ground.
At this time, when propelling the element 1 and inserting it into the ground, as shown in FIG. 3 (a), a hard rock that cannot be crushed by the blade 6 in the ground part G in the front in the insertion direction of the element 1 When there is an obstacle 8 such as an existing foundation, in order to remove the obstacle 8, the ground part G including the obstacle 8 is earthed by protruding forward of the blade 6 (FIG. 3B). reference). In addition, the earth-capped portion G that is earthed can be a work area when the obstacle 8 is removed.
[0039]
And the earth | ground part G including the obstacle 8 inside the earth retaining plate 5 which earthed is manually excavated and excavated, and the work which removes the obstacle 8 is performed. That is, the obstacle 8 is removed through the element 1 to the outside, for example, the start side shaft. Thereafter, the releasing the state in which the earth retaining at the cutting edge 6 forward pull back to position earth retaining plate 5 to the element 1 the outer surface portion, to propel the element 1 by performing additional drilling and insertion, cutting edge 6 Reaches the arrival side shaft 7, and the element 1 is buried in a predetermined place in the ground. The earth retaining plate 5 to be pulled back may be pulled back to any position as long as the tip does not protrude forward from the front surface (face face) of the blade edge 6.
[0040]
Since the earth retaining plate 5 is provided in the element 1 that is inserted and buried in the ground in this way, when the element 1 is excavated and inserted at the tip, even if there is an obstacle ahead, It is not necessary to perform earth retaining work such as installing a retaining wall or a supporting work for supporting the retaining wall in order to remove the obstacle, and the obstacle removing work can be simplified accordingly. And after this obstruction removal operation | work, the insertion operation | work of the element 1 can be restarted immediately and, thereby, the embedding operation | work of an element can be simplified and shortening of a construction period can be aimed at.
[0048]
Here, the earth retaining plate 5 described above is installed on the outer surface side of the element 1, but is not limited thereto, and may be slidably provided on the inner surface side of the element.
For example, e Remento traction method (High Speed Element Pull Method: HEP method) in combination, FIG an example of the configuration of the earth retaining plate with elements Face in cutting edge element tip is buried in the ground by method to be opened It is shown in FIG.
[0049]
The element 1C shown in FIG. 6A has a tubular shape with a rectangular cross section like the element 1 described above, and extends in the axial direction along the upper surface 1f and one side surface 1g of the inner wall surface of the tip. An earth retaining material having an L-shaped cross section (earth retaining plate) provided so as to protrude and retract in the insertion direction via guide members 55B and 56B each forming a U-shaped groove with the upper surface 1f and one side surface 1g. 5D is provided.
The element 1D shown in FIG. 6 (b) has a rectangular cross section similar to the element 1 described above and has a tubular shape, and an earth retaining material 5E having a rectangular cross section is formed on the inner peripheral surface of the front end from the front end of the element. It is provided so as to be able to hold the ground part in front of the ground. Since the effects of the elements 1C and 1D configured as described above are substantially the same as those of the element 10 with the retaining plate described above, description thereof is omitted. For example, even if there are obstacles in the front ground when inserting while excavating in the ground, it is possible to easily remove the obstacles by removing the trouble of earth retaining work when removing the obstacles, Furthermore, it can be inserted and buried in the ground.
[0050]
If the earth retaining plates 5D and 5E are provided on the inner peripheral surface like the elements 1C and 1D, other elements embedded adjacently in the corners on the outer surface side of the elements 1C and 1D A connectable joint portion can be easily provided. Further, the earth retaining plate provided on the inner side like the elements 1C and 1D can be provided along any peripheral wall surface as long as it can be protruded forward and backward from the tip end portion of the element along at least a part of the peripheral wall portion. Of course, it may be provided to appear and disappear.
[0051]
Further, the above-described movement of the earth retaining plates may be performed manually or may be performed freely using a driving device such as a hydraulic driving device.
At this time, it is desirable that the sliding movement of the retaining plate is performed irrespective of the excavation operation of the element itself. When a drive device such as a hydraulic motor or a hydraulic cylinder is used, the drive source of the drive device is preferably a drive source different from a drive source for propelling the element, such as a traction device.
[0052]
In the above embodiment, the shape of the element is rectangular, but the present invention is not limited to this, and it is tubular and can be inserted into the ground in the axial direction. Any shape may be used as long as it is embedded. For example, it may be polygonal or cylindrical. Specifically, a pipe roof etc. are mentioned.
Furthermore, a joint portion connectable to an adjacent element may be provided on the element itself .
[0053]
【The invention's effect】
According to the first aspect of the invention, when the earth retaining plate is inserted and buried in the ground, the retaining plate such as the earth retaining wall or the erection is assembled only by projecting the earth retaining plate forward from the tip. The earth retaining part ahead of the tip can be earthed without earthing work. That is, even when an obstacle that prevents insertion of the tubular member that cannot be crushed is encountered, the obstacle after the earth retaining portion including the obstacle is retained by projecting the earth retaining plate forward. The excavation work can be easily performed by manually excavating and excavating the natural ground part including
[0054]
In addition , when the tubular member with the retaining plate is inserted into the ground while excavating, the retaining plate protrudes forward from the tip even when an obstacle that prevents insertion of the tubular member that cannot be crushed is encountered. Thus, it is possible to carry out the work of removing the obstacle by carrying out earth retaining of the natural ground part including the obstacle and manually excavating the natural ground part including the obstacle. Therefore, in the obstacle removal work, the obstacle removal work can be easily performed without performing the earth retaining work such as assembling the support wall such as the earth retaining wall or the erection, and the tubular member with the earth retaining plate. The construction work can be speeded up and the construction period can be shortened.
[0058]
In addition , there is an obstacle that cannot be crushed by excavation at the tip opening portion of the blade edge mounted on the tip portion in the natural mountain portion in front of the tip portion of the tubular member with the retaining plate inserted into the ground. Even in the case, the earthen part can be easily earthed without using the earth retaining plate to assemble the earth retaining wall or the supporting work, and the earth part is manually excavated to remove the obstacle along with the earth and sand. It can be removed, the insertion work of the tubular member with a retaining plate into the ground is resumed, the burying operation of the tubular member with the retaining plate can be speeded up, and the construction period can be shortened it can.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an element according to an embodiment to which the present invention is applied.
FIG. 2 is a schematic front view showing a modified example of the mounting state of the earth retaining plate of FIG. 1;
FIG. 3 is a schematic view of a state in which the element of FIG. 1 is inserted into the ground.
FIG. 4 is a schematic front view of an element showing a modification of the element to which the earth retaining plate is attached.
[Explanation of symbols]
1 , 1C, 1D, 1E element (tubular member)
3 Underground structure 4 Ground 5 , 5 D, 5E Earth retaining plate 8 Obstacle 10 Element 11 with retaining plate Leading element (tubular member)
12 Tip 51 Top plate (earth retaining plate)
52 Side plate part (earth retaining plate)

Claims (1)

A tubular member that forms a tubular structure and that is inserted and buried in the ground while excavating the ground at the tip opening portion of the blade edge provided at the tip portion with the axial direction as the insertion direction; ,
The earth retaining member that is provided so as to be able to protrude and retract forward from the distal end portion of the tubular member along at least a part of the peripheral wall portion of the tubular member and protrudes forward to excavate a natural ground portion ahead of the distal end portion. In the embedding method of the tubular member with the retaining plate provided with the earth retaining plate,
When the tubular member with the retaining plate is inserted and buried in the ground while excavating the ground at the tip opening portion of the blade provided at the tip thereof, a ground mountain ahead of the tip of the tubular member If there is an obstacle in the part,
The earth retaining step of projecting the earth retaining plate forward from the distal end portion of the tubular member and performing earth retaining of the ground portion in front of the distal end portion;
After the earth retaining step, manually excavating the front natural ground portion retained by the retaining plate, and discharging the earth and obstacles excavated manually through the tubular member to the outside A method of embedding a tubular member with a retaining plate, wherein

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